您好我正在创建一个联系人应用程序，并在转换为新片段时遇到问题。我已经在这个问题上花了10个小时，它正把我赶到了墙上。
一旦我开始像我在学习一样，我遇到了这个问题，并完全失去了我应该做什么。 如果有人能提供指针，我将非常感激。
以下是代码的java类：
public class ContactPropertyListAdapter extends ArrayAdapter<String> {
private LayoutInflater mInflater;
private List<String> mProperties = null;
private int layoutResource;
private Context mContext;
private String mAppend;
public ContactPropertyListAdapter(@NonNull Context context, @LayoutRes int resource, @NonNull List<String> properties) {
super(context, resource, properties);
mInflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
layoutResource = resource;
this.mContext = context;
this.mProperties = properties;
}
//------------------ Stuff to change ---------------------------------------------------
// in replacement of recycler view
//change if more widgets wants to be added
private static class ViewHolder {
TextView property;
ImageView rightIcon;
ImageView leftIcon;
}
//--------------------------------------------------------------------------------------
@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
/**
******* ViewHolder Build Pattern Start *******
*/
// view holds widget in memory ahead of time for efficiency
final ViewHolder holder;
!! WHERE ERROR BEGINS !!
if(convertView == null){
convertView = mInflater.inflate(layoutResource, parent, false);
holder = new ViewHolder();
//------------------ Stuff to change ---------------------------------------------------
holder.property = (TextView) convertView.findViewById(R.id.tvMiddleCardView);
holder.rightIcon = (ImageView) convertView.findViewById(R.id.iconRightCardView);
holder.leftIcon = (ImageView) convertView.findViewById(R.id.iconLeftCardView);
//--------------------------------------------------------------------------------------
//used to store view
convertView.setTag(holder);
}
else{
holder = (ViewHolder) convertView.getTag();
}
//------------------ Stuff to change ---------------------------------------------------
final String property = getItem(position);
holder.property.setText(property);
//check if it's an email or a phone number
//email
if(property.contains("@")) {
holder.leftIcon.setImageResource(mContext.getResources().getIdentifier("@drawable/ic_email", null, mContext.getPackageName()));
}
else if((property.length() != 0)){
holder.leftIcon.setImageResource(mContext.getResources().getIdentifier("@drawable/ic_phone", null, mContext.getPackageName()));
holder.rightIcon.setImageResource(mContext.getResources().getIdentifier("@drawable/ic_message", null, mContext.getPackageName()));
}
//--------------------------------------------------------------------------------------
return convertView;
}
}
logcat消息：
FATAL EXCEPTION: main
Process: com.example.joon.contactslist, PID: 3250
android.view.InflateException: Binary XML file line #0: Binary XML file line #0: Error inflating class android.support.v7.widget.CardView
at android.view.LayoutInflater.inflate(LayoutInflater.java:539)
at android.view.LayoutInflater.inflate(LayoutInflater.java:423)
at com.example.joon.contactslist.Utils.ContactPropertyListAdapter.getView(ContactPropertyListAdapter.java:74)
at android.widget.AbsListView.obtainView(AbsListView.java:2346)
at android.widget.ListView.makeAndAddView(ListView.java:1875)
at android.widget.ListView.fillDown(ListView.java:702)
at android.widget.ListView.fillFromTop(ListView.java:763)
at android.widget.ListView.layoutChildren(ListView.java:1684)
at android.widget.AbsListView.onLayout(AbsListView.java:2148)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.RelativeLayout.onLayout(RelativeLayout.java:1079)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1166)
at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:851)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.support.design.widget.CoordinatorLayout.layoutChild(CoordinatorLayout.java:1166)
at android.support.design.widget.CoordinatorLayout.onLayoutChild(CoordinatorLayout.java:851)
at android.support.design.widget.CoordinatorLayout.onLayout(CoordinatorLayout.java:870)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.LinearLayout.setChildFrame(LinearLayout.java:1743)
at android.widget.LinearLayout.layoutVertical(LinearLayout.java:1586)
at android.widget.LinearLayout.onLayout(LinearLayout.java:1495)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.widget.FrameLayout.layoutChildren(FrameLayout.java:336)
at android.widget.FrameLayout.onLayout(FrameLayout.java:273)
at com.android.internal.policy.PhoneWindow$DecorView.onLayout(PhoneWindow.java:2678)
at android.view.View.layout(View.java:16630)
at android.view.ViewGroup.layout(ViewGroup.java:5437)
at android.view.ViewRootImpl.performLayout(ViewRootImpl.java:2171)
at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1931)
at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1107)
at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6013)
at android.view.Choreographer$CallbackRecord.run(Choreographer.java:858)
at android.view.Choreographer.doCallbacks(Choreographer.java:67
01-12 22:05:50.442 1653-1664/system_process W/ActivityManager: Force finishing activity com.example.joon.contactslist/.MainActivity
01-12 22:05:50.448 1228-1339/? D/PermissionCache: checking android.permission.READ_FRAME_BUFFER for uid=1000 => granted (312 us)
01-12 22:05:50.456 1228-1339/? D/gralloc_ranchu: gralloc_alloc: Creating ashmem region of size 1327104
以及相关的XML：
<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout
xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="match_parent"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/cardView"
app:cardElevation="3dp"
android:layout_margin="10dp"
android:layout_marginTop="30dp"
android:background="@drawable/grey_border">
<RelativeLayout
android:layout_width="match_parent"
android:layout_height="match_parent">
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginStart="20dp"
android:id="@+id/iconLeftCardView"
android:layout_centerVertical="true"/>
<TextView
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:textSize="15sp"
android:textColor="@color/black"
android:layout_centerInParent="true"
android:id="@+id/tvMiddleCardView"/>
<ImageView
android:layout_width="30dp"
android:layout_height="30dp"
android:layout_marginEnd="20dp"
android:layout_alignParentRight="true"
android:id="@+id/iconRightCardView"
android:layout_centerVertical="true"/>
</RelativeLayout>
</android.support.v7.widget.CardView>
</RelativeLayout>
我的成绩如下：
apply plugin: 'com.android.application'
android {
compileSdkVersion 26
defaultConfig {
applicationId "com.example.joon.contactslist"
minSdkVersion 20
targetSdkVersion 26
versionCode 1
versionName "1.0"
testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
}
buildTypes {
release {
minifyEnabled false
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
}
}
}
dependencies {
implementation fileTree(dir: 'libs', include: ['*.jar'])
implementation 'com.android.support:appcompat-v7:26.1.0'
implementation 'com.android.support.constraint:constraint-layout:1.0.2'
testImplementation 'junit:junit:4.12'
androidTestImplementation 'com.android.support.test:runner:1.0.1'
androidTestImplementation 'com.android.support.test.espresso:espresso-core:3.0.1'
compile "com.android.support:support-core-utils:26.1.0"
//Android Support Design Library
compile 'com.android.support:design:26.1.0'
//Universal Image Loader
compile 'com.nostra13.universalimageloader:universal-image-loader:1.9.5'
//Circle ImageView library
compile 'de.hdodenhof:circleimageview:2.2.0'
//Cardview library
compile 'com.android.support:cardview-v7:26.1.0'
}
答案 0 :(得分：0)
我认为android:background="@drawable/grey_border"会导致问题。请将其删除并尝试
<android.support.v7.widget.CardView
android:layout_width="match_parent"
android:layout_height="60dp"
android:id="@+id/cardView"
app:cardElevation="3dp"
android:layout_margin="10dp"
android:layout_marginTop="30dp">